size_t getMachineShard(const std::string& hostname = "", bool force = false) {
static size_t shard = 0;
if (shard > 0 && !force) {
return shard;
}
// An optional input hostname may override hostname detection for testing.
auto hn = (hostname.empty()) ? getHostname() : hostname;
auto hn_hash = getBufferSHA1(hn.c_str(), hn.size());
if (hn_hash.size() >= 2) {
long hn_char;
if (safeStrtol(hn_hash.substr(0, 2), 16, hn_char)) {
shard = (hn_char * 100) / 255;
}
}
return shard;
}
TEST_F(ConversionsTests, test_buffer_sha1) {
std::string test = "test\n";
EXPECT_EQ("4e1243bd22c66e76c2ba9eddc1f91394e57f9f83",
getBufferSHA1(test.c_str(), test.size()));
}
